A chair support frame that is easy to assemble

Abstract

This utility model discloses a chair support frame that is easy to assemble, including a base plate. A fixing cylinder is provided at the center of the side wall of the base plate. A lifting rod is provided inside the fixing cylinder and is slidably connected to the fixing cylinder. A fixing box is provided at the upper end of the side wall of the fixing cylinder. A spring, an auxiliary block, and an auxiliary rod are provided inside the fixing box. The auxiliary block is inside the fixing box and is slidably connected to the fixing box. A fixing hole is provided on the side wall of the fixing cylinder. A plurality of evenly distributed lifting holes are provided on the side wall of the lifting rod. The auxiliary rod passes through the fixing hole and the lifting hole and is slidably connected to them. Limiting components are provided at both ends of the base plate. A connecting plate is provided at the upper end of the lifting rod. A base connected to the connecting plate is provided at the upper end of the connecting plate through an installation component. A groove is provided on the upper side wall of the base to adapt to the personalized needs of different users and further improve the stability and safety of the device.

Description

Technical Field

[0001] This utility model relates to the field of chair support technology, and more specifically, to a chair support frame that is easy to assemble. Background Technology

[0002] In the current furniture industry, chair support frames are core components. Their ease of assembly, functional adaptability, and stability directly affect user experience and product practicality. Traditional chair support frames currently on the market are gradually revealing many problems that fail to meet user needs in practical applications, thus restricting the flexibility of chair use and assembly efficiency. Traditional chair support frames are mostly designed with a fixed height. Even the few adjustable models require disassembly with tools such as wrenches. The adjustment process is cumbersome and has low positioning accuracy. If users need to adjust the chair height due to differences in height or changes in usage scenarios, it often takes a lot of time to operate. Moreover, repeated disassembly can easily lead to wear and tear on parts, reduce the structural stability of the support frame, and make it difficult to meet the personalized needs of different users for chair height.

[0003] Meanwhile, the connection between the traditional chair support frame and the seat base is mostly made of fixed bolts or welding structure, which makes it difficult to adjust the installation position. When the base specifications change, a new support frame needs to be customized, which not only increases production and procurement costs, but also extends the product replacement cycle. Traditional chair backs are often fixed to the base, making it difficult to adjust the tilt angle. This makes it difficult to adapt to changes in the user's sitting posture, affecting both comfort and safety. Utility Model Content

[0004] (a) Technical problems to be solved In view of the problems existing in the prior art, this utility model provides a chair support frame that is easy to assemble, so as to solve the technical problems mentioned in the background art, such as the cumbersome adjustment process and low positioning accuracy in the prior art.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: A chair support frame that is easy to assemble includes a base plate. A fixed cylinder is provided at the center of the side wall of the base plate. A lifting rod is provided inside the fixed cylinder and passes through the fixed cylinder and is slidably connected to it. A fixed box is provided at the upper end of the side wall of the fixed cylinder. A spring, an auxiliary block, and an auxiliary rod are provided inside the fixed box. The auxiliary block is inside the fixed box and is slidably connected to it. One end of the spring is connected to the fixed box, and the other end is connected to the auxiliary block. The auxiliary rod passes through the fixed box and the auxiliary block. A fixing hole is provided on the side wall of the fixed cylinder. A plurality of evenly distributed lifting holes are provided on the side wall of the lifting rod. The auxiliary rod passes through the fixing hole and the lifting hole and is slidably connected to them. Limiting components are provided at both ends of the base plate. A connecting plate is provided at the upper end of the lifting rod. A base connected to the connecting plate via an installation component is provided at the upper end of the connecting plate. A groove is provided on the upper side wall of the base.

[0006] The present invention is further configured such that the limiting component includes a limiting rod and a sliding rod. The limiting rod is symmetrically arranged at both ends of the side wall of the base plate, and the sliding rod is symmetrically arranged at both ends of the bottom wall of the connecting plate. The sliding rod passes through the limiting rod and is slidably connected to it, so as to provide guidance for the connecting plate when the lifting rod drives the connecting plate to rise and fall.

[0007] The present invention is further configured such that the mounting assembly includes a slide rail, a slider, a baffle, and a screw. The slide rail is symmetrically arranged at both ends of the side wall of the connecting plate, the baffle is at the rear end of the slide rail, the slider is on the slide rail and slidably connected to it, and the screw passes through the slide rail and the slider and is threadedly connected to it. No re-drilling is required during assembly, which improves adaptability and assembly efficiency.

[0008] The present invention is further configured such that a backrest is provided in the groove, symmetrical fixing plates are provided at both ends of the rear side wall of the base, symmetrical turntables are provided at both ends of the rear side wall of the backrest, the fixing plates are fitted with the turntables, the fixing plates are provided with multiple rotating holes, the turntables are provided with auxiliary holes on their side walls, the rotating holes and the auxiliary holes can coincide, and pins are provided in the rotating holes and the auxiliary holes to meet the user's different sitting posture needs and improve the flexibility of use.

[0009] The present invention is further provided with a limit cover at the end of the auxiliary rod away from the fixed box. The limit cover is threadedly connected to the auxiliary rod to prevent the auxiliary rod from coming out of the fixed box, the fixed hole and the lifting hole.

[0010] The present invention is further provided that each of the four corners of the bottom wall of the base plate is provided with a universal wheel, and the universal wheel is provided with a matching brake assembly, so as to facilitate the flexible movement of the chair and adapt to different usage scenarios.

[0011] The present invention is further provided with a sponge cushioning layer on both the backrest and the base. The sponge cushioning layer is made of high-density sponge, which can increase the user's comfort when contacting the backrest and the base and reduce the discomfort caused by prolonged sitting.

[0012] (III) Beneficial Effects Compared with the prior art, this utility model provides a chair support frame that is easy to assemble, and has the following beneficial effects: 1. The lifting rod and the fixed cylinder are quickly positioned using an auxiliary rod, spring, and auxiliary block. No tools are required; simply pull the auxiliary rod to adjust the height of the lifting rod. After releasing, the spring pushes the auxiliary block and auxiliary rod to automatically reset, completing the fixation through the fixing hole and the lifting hole. The steps are simple and clear, and even non-professionals can complete the task efficiently, adapting to the personalized needs of different users.

[0013] 2. The limiting rod of the limiting component works in conjunction with the sliding rod to provide stable guidance when the lifting rod is adjusted in height, preventing the connecting plate from shifting during the lifting process, ensuring that the structure remains stable after the height is adjusted, and further guaranteeing the reliability of functional adaptation. 3. The backrest angle can be adjusted by rotating the turntable. When the auxiliary hole coincides with different rotating holes, the angle can be fixed by inserting the pin to meet the user's different sitting posture needs. The fixed plate fits snugly with the turntable to prevent the backrest from shaking. The operation is simple and requires no tools, which improves the flexibility of use and further enhances the stability and safety of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the chair support frame in this utility model, which is easy to assemble. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the chair support frame in this utility model, which is easy to assemble. Figure 2 ; Figure 3 This is a schematic diagram of the overall structure of the chair support frame in this utility model, which is easy to assemble. Figure 3 ; Figure 4 This is an exploded view of the chair support frame limiting cover and auxiliary rod that are easy to assemble in this utility model; Figure 5 This is a schematic diagram of the internal cross-section of the chair support frame fixing box that is easy to assemble in this utility model.

[0015] In the diagram: 1. Base plate; 2. Fixed cylinder; 3. Lifting rod; 4. Fixed box; 5. Spring; 6. Auxiliary block; 7. Auxiliary rod; 8. Connecting plate; 9. Base; 10. Groove; 11. Limiting rod; 12. Sliding rod; 13. Slide rail; 14. Slider; 15. Baffle; 16. Screw; 17. Backrest; 18. Fixed plate; 19. Turntable; 20. Pin; 21. Limiting cover; 22. Caster wheel. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0018] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0019] Please see Figure 1-5 A chair support frame that is easy to assemble includes a base plate 1. A fixing cylinder 2 is provided at the center of the upper side wall of the base plate 1. A lifting rod 3 is provided inside the fixing cylinder 2. The lifting rod 3 passes through the fixing cylinder 2 and is slidably connected to it. A fixing box 4 is provided at the upper end of the side wall of the fixing cylinder 2. A spring 5, an auxiliary block 6, and an auxiliary rod 7 are provided inside the fixing box 4 and are slidably connected to it. One end of the spring 5 is connected to the fixing box 4, and the other end is connected to the auxiliary block 6. The auxiliary rod 7 passes through the fixing box 4 and the auxiliary block 6. A fixing hole is provided on the side wall of the fixing cylinder 2. A plurality of evenly distributed lifting holes are provided on the side wall of the lifting rod 3. The auxiliary rod 7 passes through the fixing hole and the lifting hole and is slidably connected to them. Limiting components are provided at both ends of the base plate 1. A connecting plate 8 is provided at the upper end of the lifting rod 3. A base 9 connected to the connecting plate 8 through an installation component is provided at the upper end of the connecting plate 8. A groove 10 is provided on the upper side wall of the base 9.

[0020] The limiting assembly includes a limiting rod 11 and a sliding rod 12. The limiting rod 11 is symmetrically arranged at both ends of the upper side wall of the base plate 1, and the sliding rod 12 is symmetrically arranged at both ends of the bottom wall of the connecting plate 8. The sliding rod 12 passes through the limiting rod 11 and is slidably connected to it.

[0021] The mounting assembly includes a slide rail 13, a slider 14, a baffle 15, and a screw 16. The slide rail 13 is symmetrically arranged at both ends of the upper side wall of the connecting plate 8. The baffle 15 is at the rear end of the slide rail 13. The slider 14 is on the slide rail 13 and slidably connected to it. The screw 16 passes through the slide rail 13 and the slider 14 and is threadedly connected to them.

[0022] The auxiliary rod 7 is provided with a limit cover 21 at the end away from the fixed box 4, and the limit cover 21 is threadedly connected to the auxiliary rod 7.

[0023] In this embodiment, the operator first lays the base plate 1 flat and inserts the lifting rod 3 from the upper end of the fixed cylinder 2, so that the lifting rod 3 and the fixed cylinder 2 maintain a sliding fit. At this time, the sliding rod 12 can slide smoothly along the limiting rod 11 and initially form a stable connection with the base plate 1. Then, the base 9 and the connecting plate 8 are assembled. The operator only needs to put the bottom wall of the base 9 into contact with the upper surface of the slider 14, push the base 9 to make the slider 14 slide forward along the slide rail 13 until the rear end of the base 9 is in contact with the baffle 15. Then, the screw 16 is used to pass through the slide rail 13 and the slider 14 and tightened to firmly fix the base 9 on the connecting plate 8, thus completing the assembly of the base 9.

[0024] More specifically, the chair height is adjusted according to user needs. During adjustment, the operator holds the limiting cover 21 at the end of the auxiliary rod 7 away from the fixed box 4 and unscrews it, pulling the auxiliary rod 7 outward. The auxiliary rod 7 causes the auxiliary block 6 inside the fixed box 4 to compress the spring 5. At the same time, the auxiliary rod 7 disengages from the fixing hole of the fixed cylinder 2 and the lifting hole of the lifting rod 3, releasing the fixation on the lifting rod 3. At this time, the connecting plate 8 can be pushed up or down. The connecting plate 8 causes the lifting rod 3 to slide along the fixed cylinder 2. At the same time, the sliding rod 12 slides synchronously along the limiting rod 11 until the appropriate height is achieved. The auxiliary rod 7 is then released, and the spring 5 returns to its original shape, pushing the auxiliary block 6 and the auxiliary rod 7 back to their original positions. The auxiliary rod 7 then re-passes through the fixing hole and the corresponding lifting hole, completing the height fixation. Finally, the limiting cover 21 is tightened to further prevent the auxiliary rod 7 from disengaging during use and to ensure height stability.

[0025] Please see Figures 1-5 As one embodiment of the backrest 17: the backrest 17 is provided in the groove 10, the two ends of the rear side wall of the base 9 are provided with symmetrical fixing plates 18, the two ends of the rear side wall of the backrest 17 are provided with symmetrical turntables 19, the fixing plates 18 and the turntables 19 are fitted together, the fixing plates 18 are provided with a plurality of rotating holes, the side wall of the turntables 19 is provided with auxiliary holes, the rotating holes and the auxiliary holes can coincide, and the rotating holes and the auxiliary holes are provided with pins 20.

[0026] Specifically, hold the backrest 17 and gently rotate it. The turntable 19 will rotate synchronously with the backrest 17. When the auxiliary hole on the side wall of the turntable 19 coincides with the rotation hole at the appropriate position on the fixed plate 18, insert the pin 20 into the coincided rotation hole and auxiliary hole to fix the angle of the backrest 17. If the angle needs to be adjusted, pull out the pin 20, rotate the backrest 17 again to make the auxiliary hole coincide with other rotation holes, and then insert the pin 20.

[0027] Please see Figures 1-5As one embodiment of the caster wheel 22: caster wheels 22 are provided at the four corners of the bottom wall of the base plate 1, and brake components adapted to them are provided on the caster wheels 22.

[0028] Specifically, when the chair needs to be moved, the operator only needs to push the chair, and the casters 22 will rotate freely in the direction of the push, easily moving the chair to different areas without the need for strenuous handling.

[0029] Please see Figures 1-5 As one embodiment of the sponge cushioning layer: both the backrest 17 and the base 9 are provided with a sponge cushioning layer, which is made of high-density sponge.

[0030] Specifically, when a user sits on the base 9 with their back against the backrest 17, the high-density sponge cushioning layer will deform appropriately due to the force, conforming to the curve of the contact area of ​​the human body, dispersing the local pressure of the body on the base 9 and backrest 17, and avoiding pressure pain after sitting for a long time.

[0031] In summary, when using the overall equipment: First, the basic frame assembly is completed. The operator lays the base plate 1 flat and inserts the lifting rod 3 from the top of the fixed cylinder 2, keeping the two in sliding fit. At this time, through the guiding fit of the sliding rod 12 and the limiting rod 11, a stable basic frame is formed, and the pre-assembly of the height adjustment structure is initially realized.

[0032] Next, the base 9 is easily installed and removed. The operator aligns the bottom wall of the base 9 with the upper surface of the slider 14, pushes the base 9 to move the slider 14 forward along the slide rail 13 until the rear end of the base 9 is tightly fitted with the baffle 15 (at this point, the slider 14 reaches the only installation position). Then, screws 16 are used to pass through the slide rail 13 and the slider 14 and tightened to firmly fix the base 9 on the connecting plate 8, completing the installation. If the base 9 needs to be removed later, simply unscrew the screws 16, push the base 9 to move the slider 14 backward along the slide rail 13, and the base 9 can be easily removed, greatly simplifying the installation and removal process and avoiding the cumbersome operation of traditional fixed connections.

[0033] Afterwards, the backrest 17 is installed and its angle is fixed. The angle of the backrest 17 is adjusted according to the user's sitting posture requirements. Hold the backrest 17 and rotate it slowly. The turntable 19 rotates synchronously with the backrest 17. When the auxiliary hole on the side wall of the turntable 19 is aligned with the rotating hole at a certain position on the fixed plate 18, the pin 20 is inserted through the aligned rotating hole and auxiliary hole to lock the angle of the backrest 17. If the angle needs to be changed, the pin 20 is pulled out and the steps of rotating and fixing with the pin 20 are repeated. The fit design of the fixed plate 18 and the turntable 19 ensures that the backrest 17 is stable and does not shift when rotating, while the pin 20 prevents the angle from changing on its own during use. Next, adjust the chair height according to the user's height. When adjusting, hold one end of the auxiliary rod 7 and pull it outward. The auxiliary rod 7 drives the auxiliary block 6 to compress the spring 5 in the fixing box 4. At the same time, it disengages from the fixing hole of the fixing cylinder 2 and the lifting hole of the lifting rod 3, releasing the fixing of the lifting rod 3. At this time, push the connecting plate 8 up or down. The connecting plate 8 drives the lifting rod 3 to slide along the fixing cylinder 2. The sliding rod 12 slides along the limit rod 11 at the same time (the limit component ensures that the connecting plate 8 does not tilt or deviate when it is raised or lowered) until the appropriate height is adjusted. Release the auxiliary rod 7. The spring 5 returns to its deformation and pushes the auxiliary block 6 and the auxiliary rod 7 to reset. The auxiliary rod 7 re-passes through the fixing hole and the corresponding lifting hole to complete the height fixation. Finally, tighten the limit cover 21 to further prevent the auxiliary rod 7 from falling off and ensure height stability. If you need to change the position of the chair, you can push the chair and move it flexibly via the casters 22 at the four corners of the bottom wall of the base plate 1. The casters 22 can turn freely according to the direction of the push force, so there is no need to carry it. After reaching the target position, operate the brake assembly on the casters 22 to limit the rotation of the wheels and ensure that the chair is parked stably. In daily use, the sponge cushioning layer on the base 9 and the sponge cushioning layer on the backrest 17 will deform appropriately with the user's contact, conforming to the body curves to distribute pressure and improve comfort.

[0034] In all the solutions mentioned above, the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents. In all the solutions mentioned above, the operation of electrical components is controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies. Therefore, their electrical connection relationships and specific circuit structures will not be elaborated here.

Claims

1. A chair support frame that is easy to assemble, comprising a base plate (1), characterized in that: A fixed cylinder (2) is provided at the center of the upper side wall of the base plate (1). A lifting rod (3) is provided inside the fixed cylinder (2). The lifting rod (3) passes through the fixed cylinder (2) and is slidably connected to it. A fixed box (4) is provided at the upper end of the side wall of the fixed cylinder (2). A spring (5), an auxiliary block (6) and an auxiliary rod (7) are provided inside the fixed box (4). The auxiliary block (6) is inside the fixed box (4) and is slidably connected to it. One end of the spring (5) is connected to the fixed box (4), and the other end is connected to the auxiliary block (6). The auxiliary rod (7) passes through the fixed box (4) and the auxiliary block (6). The side wall of the fixed cylinder (2) is provided with a fixed hole. The side wall of the lifting rod (3) is provided with a plurality of evenly distributed lifting holes. The auxiliary rod (7) passes through the fixed hole and the lifting hole and is slidably connected to them. The bottom plate (1) is provided with limit components at both ends. The upper end of the lifting rod (3) is provided with a connecting plate (8). The upper end of the connecting plate (8) is provided with a base (9) connected to it by an installation component. The upper side wall of the base (9) is provided with a groove (10).

2. The chair support frame that is easy to assemble according to claim 1, characterized in that: The limiting assembly includes a limiting rod (11) and a sliding rod (12). The limiting rod (11) is symmetrically arranged at both ends of the upper side wall of the base plate (1), and the sliding rod (12) is symmetrically arranged at both ends of the bottom wall of the connecting plate (8). The sliding rod (12) passes through the limiting rod (11) and is slidably connected to it.

3. The chair support frame that is easy to assemble according to claim 1, characterized in that: The mounting assembly includes a slide rail (13), a slider (14), a baffle (15), and a screw (16). The slide rail (13) is symmetrically arranged at both ends of the upper side wall of the connecting plate (8). The baffle (15) is at the rear end of the slide rail (13). The slider (14) is on the slide rail (13) and slidably connected to it. The screw (16) passes through the slide rail (13) and the slider (14) and is threadedly connected to it.

4. The chair support frame that is easy to assemble according to claim 1, characterized in that: A backrest (17) is provided in the groove (10). Symmetrical fixing plates (18) are provided at both ends of the rear side wall of the base (9). Symmetrical turntables (19) are provided at both ends of the rear side wall of the backrest (17). The fixing plates (18) are in contact with the turntables (19). Multiple rotating holes are provided on the fixing plates (18). An auxiliary hole is provided on the side wall of the turntable (19). The rotating holes and the auxiliary holes can overlap. A pin (20) is provided in the rotating holes and the auxiliary holes.

5. A chair support frame that is easy to assemble according to claim 1, characterized in that: The auxiliary rod (7) is provided with a limit cover (21) at the end away from the fixed box (4), and the limit cover (21) is threadedly connected to the auxiliary rod (7).

6. A chair support frame that is easy to assemble according to claim 2, characterized in that: The bottom plate (1) is provided with casters (22) at the four corners of the bottom wall, and the casters (22) are provided with brake components that are compatible with them.

7. A chair support frame that is easy to assemble according to claim 4, characterized in that: Both the backrest (17) and the base (9) are provided with a sponge cushioning layer, which is made of high-density sponge.

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